Add host_supported to libgatekeeper. am: 644ddd6370 am: d61a9cbb23 am: 2666b34001 am: a225206e97 am: b628d2a7dc

Original change: https://android-review.googlesource.com/c/platform/system/gatekeeper/+/1340498

Change-Id: I8d0a7d9d2a40f21621d2bfa0974bfdae8d9c959e